Unlike Android that allows you to customize and create a ringtone easily, iPhone only uses M4R files as ringtones, and the length is limited to 40 seconds for phone ringtone and 25 seconds for SMS ringtone. Therefore, it means you have to extract the audio less than 40 seconds from an MP4 video and then convert it to iPhone ringtone format - M4R. Sounds complicated? No worries, with the help of HD Video Converter Factory Pro – a handy and all-around A/V conversion utility, all you need to do is just click your mouse a few times.
Now, get this simple MP4 to M4R converter free downloadfree download, let's see how to convert MP4 to ringtone for iPhone with this powerful tool.